Pump stopper



FIG. 1 is a front perspective view of a pump stopper, showing my new design;

FIG. 2 is a bottom view thereof;

FIG. 3 is a back view thereof;

FIG. 4 is a left side view thereof and the right side is a mirror image of the left side view;

FIG. 5 is a front view thereof; and,

FIG. 6 is a top view thereof.

The broken lines shown in the figures are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for pump stopper, as shown and described. 